Embarrassment

It was ingenious, even Dyon had to admit so. The fireflies would absorb the residual heat, use it to power the light they produced, and effectively lower the obscene temperatures of the world. As a result, unlike the desert bubble world that was nearly impossible for mortals to live in, it wouldn't be difficult for one to do so in this Dark Flame world. 

"… Father, Grandfather, this is an opportunity. I'm well aware of the risks, and now you two are as well. We cannot let it slip us by." 

At this moment, Crystella faced her father and grandfather within an underground city. 

The city's on the surface were only the tip of this world's iceberg. When it came to where the true power of this world was held, one could only find out more by sinking deep within it. Only those of great standing could find themselves a place in these underground havens.